Machine



(No Model.) 2 Sheets-Sheet 1'.

S. W. JAM ISON.

BOOT 0R SHOE GRIMP-ING MACHINE. No. 303,018. I Patented Aug. 5, 1884.

7 FIGJ.

ATTEST- I YYNVE'NTOR; fim W74" N. Firms. Hwwulho n mr. Washingim. n c.

(No Mociel.)

2 Sheets-Sheet 2.- S. W. JAMISON.

V BOOT 0R SHOE URIMPING MACHINE. No. 803,018. V Patented Aug. 5, 1884.

UNITED STATES Artur tries.

SAMUEL \V. JAMISOX, OF BOSTON, MASS, ASSIGNOR TO THE S. V. JAMISON BOOTAND SHOE OBIMPING MACHINE COMPANY, OF NEYV YORK, N. Y.

BOOT OR SHOE CRiMPING MACHiNE.

SPECIFICATION forming part of Letters Patent No. 303.018, dated August5, 1884.

Application filed May 8, 1884. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL VV ILD J AMISON, of Boston, in the county ofSuffolk and State of Massachusetts, have invented. a new and usefulImprovement in Boot and Shoe Crimping Machines, which Improvement isfully setforth in the following specification.

This invention relates to mechanism for crimping and smoothing skins orleather by power. I have heretofore devised machines for this purpose,for which Letters Patent have been granted at different times. (SeePatent No. 218,177, dated August 5, 1879, and those referred to in thespecification making part thereof.) Machines embodying the patentedimprovcments,while practical and useful, have nevertheless been foundtohave certain defects. These the present invention is designed toremove. In order properly to'perform the crimping operation, neithertearing the material nor stretching it so little that it resumes itsformer shape, the pressure against the crimpingj aws must be adapted tothe thickness and texture of the skin in process of crimping.

It is found that skins even of the same kind and grade vary from oneanother to such an extent that it is necessary or very desirable tochange the pressure almost constantly. Sometimes it may be with everysuccessive skin. In my former machines, wherein the pressure is appliedby a weighted lever-arm, which tends to turn ascrew-shaft, the weight onsaid leverarm is connected with a treadle. By depressing the treadle theoperator eanlift the weight and relieve the pressure on the crimping-jjaws.

It hasbeen attempted to regulatethe pressure on the jaws by pressingmore or less upon the treadlc; but it is dilficult or impossible tobalance more or less of a weight, so as to effect a satisfactoryregulation. This is partly because there is no movement of the treadleunder the foot, unless the weight is lifted bodily, and

also because the operator is required to apply more pressure on thetreadle in order to diminish the pressure on the crimpingj aws. Thismode of applying pressure on the jaws is also objectionable,becausetheweight s always set to a certain maximum, which can only be changedby increasing or diminishing the 0 weight on the lever. 1n the presentinvention a series of levers are provided, through which the operatorapplies more or less pressure on the crimpingjaws by increasing ordiminishing the pressure upon a treadle or other device of a similarnature. A spring or equivalent means retract the jaws, holding them openwhen the pressure is not applied. In this invention, also, a greatsimplification is effected,

and the construction and arrangement of parts is such there is lessliability of breakages occurring.

The following is considered the best mode of applyingthe principle ofthe invention, reference being had to the accompanying draw- 6 5 ings,which form part of this specification.

Figure l is a front elevation of a machine constructed in accordancewith the invention,

parts of said machine being broken away to show devices behind; Fig. 2,a partial view in vertical section; Fig. 3, a side elevation, and Fig.4a detail view.

The machine'frame consists of a pedestal, A, and upright side frames,13, the latter being connected together at the top. The trucks 7 5 E,which carry the criinpingjaws D, and 'smoothingjaws E, slide on waysattached to or making part of the side frames. On each truck aretwocylinders or turrets, F G, re-

spectively, and fitting over each cylinder or turret is a sliding cap, HI. The caps are prevented from turning on their respective turrets bypins or Ebolts 40, which pass through the lugs 41 on the caps, and arefastened in the body of the truck. on the pins or bolts 40. Each cap orslide H carries a crimping-jaw, D. This jaw is pivoted on the face ofthe cap by a pin, 1, and its position is adjusted bythe set-screws 2, of

which there are two to each jaw-one on each side of the pivot. The capon slide His fastened (by a screw, as shown) to a plunger, 4., which isfree to slide in the turret F. A spiral compressionspring, 3, confinedbetween the plate 5 (fastened by screws to the turret F) and theenlargement 6, at the outer end of the The lugs 41 mayslide 85 throughlugs 25 on the trucks.

plunger 3, tends to move the crimping-jaw outward or away from the treeor crimping form N. The crimpingjaws are pressed inward by the operatorduring the descent of the trucks, in order to act upon the leather onthe form or tree N. A lever, K, pivoted at 7 to lugs on the back of eachtruck 0, bears at 8 against the outer end of the plunger 4.. The bar L,connected with the side frame, B, at top and bottom by means of theshort links 9, is arranged outside each leverK, so that when depressedsaid bar is by the turning of'the links 9 forced inward, and, bearingagainst the friction-roll at the end of lever K, presses said lever inalso. The bars L are each joined by a connecting-rod, 10, to a shortarm, 11, of the rock-shaft M, which latter is journaled in bearings inthe pedestal A. Apedal-lever, P, is keyed at the middle to therock-shaft M. By bearing on the pedal 12 at the front end of the leverthe operator can depress both bars L, and force in the crimping-jaws I),simultaneously and to an equal extent. The rear arm carries anadjustable weight, 13, the object of which is to turn the rock-shaftwhenever the operator lifts his foot from the pedal. The smoothing-jawsE are each pivoted at 14 to and between brackets 011 one of the caps I.Toggle-levers Q, jointed to lugs on the cap I, and jaw E, move thelatter into and out of position for acting upon the leather on the treeor form. Each toggle is operated by a bell-crank lever, B, pivoted at 15to a bracket on the cap I, and provided at the end of its horizontal armwith a pin, 16, which fits in a slot in the link 17, connected with thecentral pivot-pin, 18, of the toggle. The caps or slides I are eachfastened by screwsv or otherwise to a thick rod, 19, which passesthrough a hole in the truck. A very strong spiral compression spring,20, -surrounds the rod 19, and is confined between the face of the capand the truck. These springs tend to force the caps I and smoothing-jaws E inward, so as to bear against the leather or skin on the treeor form N. At the outer end of the rod 19 isacross-bar, 2l,whichprojects into grooves 22 in the side frames. At the ends of thecross-bar are rollers,which travel over the track 23 at the inner sideof the grooves. This trackis cut away at the bottom, forming an incline,24. WVhen the crossbar 21 reaches the said incline, saidbar is re leasedgradually, and the spring then presses the smoothing-jaw against theleather on the tree. The trucks 0 are raised and lowered by thescrew'shafts S, which are journaled in bearings of the side frame, andare tapped The shafts S are turned by bevel-gears 26, which are engagedby the gears 27 on the cross-shaft T. The screw-shafts S are so threadedand the gearing so arranged that the trucks move up and down together atequal speed. The shaft T is driven bya belt on the pulleys28, 29, and

30. The intermediate pulley, 29, is fixed on the said shaft. The outerones, 28 and 30, are loose. When the machine is at rest, a crossed beltruns on one loose pulley, a straight belt ving the roekshaft half wayand moving the belt, which was previously on the middle pulley, onto aloose one, and thus stopping the machine. Abrake, X, is applied when thebelt leaves the fixed pulley in order to stop the machine more quickly.The tree or crimping-form N is fastened to slides 37, which are free tomovein ways of the standards 38,which are bolted to the pedestal A.

The operation of .the machine is as follows: The trucks being at the topof the machine the operator places the leather or skin 011 the tree,

and starts the machine by turning the handle 35 to the right. Thescrew-shafts S draw down the trucks. WVhen the crimping-jaws are inposition to act upon the leather or skin, the operator by his foot onthe treadle applies pressure to the crimping-jaws and varies thepressure as his judgment dictates. The arrangement through which thepower is transmitted multiplies enormously the pressure on the treadle.As the truck continues to descend the cross-bars 21 escape from thetracks 23, and the springs then force the smoothing-jaws inward'so thatthey act upon the leather immediately after the crimping-jaws. WVhenthetrucks approach the end of their descent the projection 36 acts upon thecam 34, and turns the rock-shaft WV to the left, shifting the belt ontothe loose pulley and stopping the ma chine. I11 order to start the truckupward, the operator turns the handle 35 still farther to the left, soas to bring the other belt upon the middle pulley. Before he does this,however, he releases the pressure upon the crimping-jaws, whereupon thesprings 3 open them, and he also turns back the smoothing-jaws andremoves the crimped skin. lVhen the truck is at the top of its movement,the projection 36 acts upon the cam 33, turns the r0ck-shaft WV to theright and stops the machine.

It is evident that modifications may be made in details withoutdeparting from the spirit of the invention, and parts of the inventionmay be used separately. Thus, instead of springs, weights could-be used,but the springs admit of a more compact and less expensive constructionin the machine.

The turrets need not be cylindrical, but may carried by said trucks, anda system of levers connected with a treadle, as set forth, for clhsingsaid jaws upon the leather when the treadle is depressed and magnifyingthe pressure transmitted from said t-readle, substantially as described.

'2. The, combination, with the sliding trucks and the crimping-jawscarried thereby, of the levers connected with a treadle, as set forth,for closing said jaws, and the springs for separating said jaws onrelease of the treadle, substantially as described.

The combination, with the truck and the turret thereon, of the slidingcap, the crimplug-jaw, the plunger, and spring, all carried by saidtruck, substantially as described.

4.. The combination, with the trucks and crimping-jaws carried thereby,of the levers iulcrumed one on each truck, the bars for acting on saidlevers to press in the crimping jaws, the links connecting the said barswith the machine-frame, the treadle, and the connections bet ween thesaid treadle and the afore said bars, substantially as described.

5. The combination, with a truck and turret thereon, of the sliding cap,crimping-jaw, plunger, spring, lever carried by the truck, operatingbarconnected by links to the macl'iine-franie, and the treadleconnections,substantially as described.

6. In a leather-crimping machine, the combination,with the machine-frameand the sliding trucks movable in ways of the machineframe, of thesmoothing-jaws, the slides or sliding caps carrying the said jaws,and-the springs for forcing said slides and jaws inward, substantiallyas described.

7. The combination, with the trucks, the smoothing-jaws, and the springsand slides or sliding caps connected with said jaws, of the tracks onthe machine-frame, and devices, such as the rod and cross-bar, forholding back the smoothingjaws except when they are in position toact-upon the leather, substantially as described.

8 The combination, with the trucks, the power mechanism for raising andlowering the same, the crimping and smoothing jaws placed on saidtrucks, and the tree or crimping form,

of the treadle and connected levers, as set forth, for pressing in thecrimping-jaws, and the springs and slides or sliding caps connected withthe smoothing-jaws, substantially as described.

9. The combination, with the machine-frame and the tree or crimping formcarried by slides on said frame, of the trucks, the crimping-j aws, thetreadle, and the connections for conveying the pressure from the treadleto the crimpingjaws and for magnifying the pressure conveyed,substantially as described.

10. The combination, with the trucks, the

jaws carried thereby, and the power mechanism for raising and loweringthe same, of the treadle and connections for conveying pressure fromsaid treadle to the crimping-jaws and for magnifying the pressureconveyed, and the stop mechanism for arresting the trucks at the ends ofits movements, substantially described.

11. The combination of the machine-frame, the tree or crinipingformcarried by slides, the trucks, the smoothing-jaws carried by saidtrucks, and the springs and slides or sliding caps connected with saidsmoothing-jaws, the cross-bar arranged at the back of the trucks andconnected with the smoothingjaws, and the tracks on the machine-framefor holding them away from the leather until the proper point in theirdescent is reached, substantially as described.

12. The described crimping-machine, comprising, in combination, themachine-frame, the form, the trucks, the power mechanism, the jaws onsaid trucks, the treadle and lever mechanism, as set forth, for pressingin the crimping-jaws, the springs and slides or sliding caps connectedwith the smoothingjaws, and the stop mechanism, substantially as setforth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

S. \V. JAMISON.

\Vitnesses:

A. PoLLoK, PHILIP hLlURO.

